A person duly authorised in writing by a highway authority may at any reasonable time enter on any land for the purpose of surveying that or any other land in connection with the exercise by that authority, in their capacity as a highway authority, of any of their functions.
A person may not be authorised under subsection (1) to enter and survey or value land in connection with a proposal to acquire an interest in or a right over land (but see section 172 of the Housing and Planning Act 2016).
The power conferred by this section to enter on land includes power to place and leave on or in the land any apparatus for use in connection with any survey of that or any other land (whether from the air or on the ground) and to remove such apparatus.
The power conferred by this section to survey land includes power to search and bore for the purpose of ascertaining—